Quartzite
Quartzite (primarily SiO2)
Category
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
Blue Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Yellow Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
Natural or Cultured Pearl
Calcium Carbonate (Aragonite and Conchiolin), CaCO3
Diamond
Carbon (C)
Script Jasper
Silicon Dioxide (SiO2) with impurities
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Geode (unopened)
Chert / Chalcedony Geode (SiO2)
Carnelian Agate / Iron-Stained Quartz
SiO2
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Sandstone (with Iron Staining)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) oxides)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Blue Quartzite
Metamorphosed Quartz (SiO2) with inclusions
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Smoky Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
Chert (variously known as Flint)
Microcrystalline quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Jasper
Jasper (Silicon Dioxide, SiO2)
Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Septarian Nodule Geode
Septarian concretions (composed of Calcite, Aragonite, and Limestone)
Chert Geode or Nodule
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milk Quartz (White Quartz)
Silicon Dioxide (SiO2)
Chert (Jasper)
Silicon dioxide (SiO2)
Chert (Mudstone)
Microcrystalline Quartz (SiO2)
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
Rhodochrosite in Quartz
Manganese Carbonate (MnCO3)
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Ferruginous Oxides
Petrified Wood
Silicified Wood (SiO2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Oolitic Chert
Oolitic Microcrystalline Quartz (SiO2)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)